Clean Energy Index founder does well at doing good.

ENCINITAS, Calif. - From his solar-heated swimming pool to the custom hybrid car he's having built, Robert Wilder appears a model citizen in the green revolution. There's one big difference: It's making him rich. Wilder, 47, is co-founder of the WilderHill Clean Energy Index ([url=http://stocks.usatoday.com/custom/usatoday-com/html-quote.asp?symb=ECO]ECO[/url]) of environmentally sound companies that has become a barometer for the investment craze of trying to cash in on global climate change.